public class Main {
    public static void main(String[] args) {
        String sss = "FF FF 0E 00 00 00 00 00 00 04 0F 5A 00 00 00 04 7F";
        String dd = "2#checkMsg";
        System.out.println(sss.length());
        String s2 = "012234567";
        System.out.println(s2.charAt(1));

    }
}
